The bonds are issued for a tenor of 15 years, with call option after 10 years and each anniversary dates thereafter and are rated AAA with stable outlook from CRISIL Ratings Limited and CARE Ratings Limited. The bonds are issued for a tenor of 15 years, with call option after 10 years and each anniversary dates thereafter and are rated AAA with stable outlook from CRISIL Ratings Limited and CARE Ratings Limited. Zee News :Business